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1)  Hydrophilic chain-extending agents
亲水扩链
2)  hydrophilic chain-extender
亲水扩链剂
1.
In the experiment,di-isocyanate,polyether diol and a hydrophilic chain-extender were used to synthesize aqueous urethane.
实验采用二异氰酸酯与聚醚二元醇、亲水扩链剂反应合成水性聚氨酯。
3)  hydrophilic segment
亲水链段
1.
The influence of hydrophilic segment chain length of the polyethylene (PEG) on contact angle,water-vapor permeability,water-absorbing capacity and mechanical properties of polyurethane film was investigated.
探讨了聚乙二醇(PEG)亲水链段的分子链长,对聚氨酯薄膜表面接触角、透气性、吸水率和力学性能的影响。
2.
The synthesis of the polyester-polyol poly-segment copolymers was studied , and a copolymer was synthesized and theoretically evaluated for its co-crystalline and hydrophilic segments and its structural characteristics by the modern analytic means such as IR, GPC and DSC.
合成了聚酯-聚醚多嵌段型共聚物,经共聚物的共晶链段和亲水链段的理论估算,合成了一种聚酯-聚醚型亲水抗静电剂。
4)  hydrophilic chain
亲水链
5)  chain extension
扩链
1.
Study on chain extension reaction of PA 1010;
PA1010的熔融扩链反应
2.
Study on synthesis and chain extension of SMA;
SMA的合成及扩链研究
6)  chain extending
扩链
1.
A series of polyethers are modified by chain extending method.
以己二酸和癸二酸做扩链剂对 DA系列聚醚进行了扩链改性 。
2.
The aqueous polyurethane prepolymers(PU) were synthesized from isocyanate,polyether polyhydric alcohol and dimethylolpropionic acid and the aqueous polyurethane modified with acrylate(PUA) was prepared through chain extending,cross bonding and modification and hybridization with acrylate.
以异氰酸酯、聚醚多元醇及二羟甲基丙酸为主要原料,合成了水性聚氨酯预聚体(PU),并且经过扩链、交联、丙烯酸酯复合改性等反应制备了丙烯酸酯改性水性聚氨酯树脂(PUA)。
补充资料:链增长剂
分子式:
CAS号:

性质:又称链增长剂,扩链剂。是指能与线型高分子化合物链上的官能团作用而使分子链扩展的物质,有多元醇类、多元胺类等。如多元醇能与聚氨基甲酸酯链上的异氰酸酯官能团作用而使分子链扩展。在化纤工业中,对某种具二官能团化合物专称链扩展剂,系指能和具活性端基的预聚体作用,可生成线性嵌段共聚物的某些低分子物;如二元胺、二元醇和二元酸等。在聚氨酯弹性纤维的生产中,它被专用于与两端含异氰酸基的预聚物(聚酯或聚醚)反应,使原先不很长的预聚物分子链增长,扩展成为具嵌段结构的大分子长链,故称其为链扩展剂,也称链增长剂。生产中常用的有:二元胺(各种脂肪族、环脂族和芳脂族的二胺均可)和二元醇(如1,4-丁二醇);一般应用于纺丝前成纤高聚物制备的过程中,但也有用于聚氨酯成纤高聚物的纺丝过程之中(如反应纺丝法)。

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